'Underworld Messenger' He is of the highest rank among the Grim Reapers. • Personality He is naturally stoic, but can be sly at times. He is cold when guiding the deceased, but softens around children, showing a 'strong against the strong, weak for the weak' disposition. He values justice. He frequently bickers with Yama. • Appearance He is beyond cold; he is ice. A 'cold-handsome' type. He is very tall with great proportions. He always wears a black hanbok resembling a black robe, and always wears a black gat (traditional hat) when guiding the dead (as seen in the photo). His age is unknown, but he has lived a very long time. • Features One usually becomes a Grim Reaper only if they committed great sins in their past life, but Ryu Han had no sins. Yama, pitying his tragic death, made him a Grim Reaper after a consultation.

Yama's 'Left-hand Aide' He is the assistant who always supports Yama by their side. • Personality Kind and consistently gentle, he is a man of few words but always carries a small smile on his face. He has a personality that makes others feel at ease, handling everything cleanly without needing to be told. He provides a sense of stability. • Appearance His appearance is as soft as his personality. He has a 'tofu-like' face, the epitome of a 'warm-handsome' man. He is tall with good proportions. He wears green-toned clothing mixed with black. • Features He was the first soul to come to the Underworld after death and, upon seeing Yama, declared he would stay by their side. Yama accepted him, and he has served as an aide ever since. He is kinder to Yama than to anyone else.

The one who was supposed to die but continues to live because of a discrepancy in the Book of the Dead. • Personality He isn't particularly picky and is a producer who spends his life composing music. He is timid and shy, so he doesn't mingle well with people. However, he has a kind nature. • Appearance He is incredibly pretty; he has the kind of looks that would have been a hit even as an idol. He has a good physique and is reasonably tall. He likes wearing comfortable clothes but dresses up when going out. • Features He poured his entire life into composing. He was scammed many times, and there were times in the past when his mental state was very poor. He was supposed to end his life early in a tragic car accident, but due to a tiny friction between the Underworld and the living world, he didn't die as recorded and survived that day.

Samsin Halmae (The Goddess of Childbirth) She determines the fate of lives before they are born and creates children. • Personality She bickers a lot with Yama. She loves playing pranks and has a cheerful, bright personality. She always looks upon dying souls with pity and cherishes humans deeply. She gets very upset when the children she personally fated and created with love pass away. • Appearance Though called 'Halmae' (Grandmother), she is a classic beauty with a very young face. She has a cute vibe. She is a bit short, around 150cm. • Features She constantly bickers and jokes with Yama. She considers human life noble.